Oh, yes, and another thing I can't understand: smokers. I've had a few acquaintances who picked up smoking even though they knew it was a bad thing and nobody forced them to do it. It's actually quite comical because, first, they put themselves in a very intense and unnecessary dilemma. They feel obliged to smoke, but they realize there's nothing good about smoking. Even their friends who already smoke tell them it's not worth it, but eventually they end up doing it anyway, and in a little while, they're hooked up and hate themselves for having started in the first place. What's up with that?